Aviation safety investigations & reports

Engine in-flight shutdown - Boeing 777-2H6 aircraft, 9M-MRM, 74km WNW Brisbane Airport, Qld, 18 September 2006

Investigation number:
Status: Completed
Investigation completed


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On 18 September 2006, at 1417 Eastern Standard Time, a Boeing Co 777-2H6 aircraft, registered 9M-MRM, departed Brisbane Airport, Qld for Kuala Lumpur, Malaysia. The flight crew reported that, at approximately 1422, when the aircraft was 74 kms west-north-west of Brisbane Airport and climbing through 10,300 ft, they felt a 'sudden jerk' followed by an Engine Indication and Crew Alerting System message 'ENG FAIL R'. The crew informed Brisbane Air Traffic Control of the right engine failure and performed the relevant checklist items to successfully restart the right engine.

After dumping fuel to reduce the landing weight, the crew returned the aircraft to Brisbane Airport. The company's ground handling agent's engineering personnel replaced the right engine Fuel Metering Unit (FMU) and the aircraft was returned to service.

The investigation found that there had been a loss of damping fluid in the turbine overspeed servo valve, adversely affecting the operation of the servo valve. As a result, the turbine overspeed servo valve became de-latched, and the engine shut down in flight.

A number of safety actions were carried out as a result of this incident, including by the:

  • manufacturer of the turbine overspeed servo valve, who will check the servo valve when the units are returned for overhaul; and
  • manufacturer of the FMU, who mandated a check of the torque setting of the turbine overspeed servo valve retaining bolts when the units are returned to their repair bases.

In addition, the engine manufacturer:

  • is investigating the feasibility of the development of a test to confirm the serviceability of the turbine overspeed servo valve damping fluid in installed engines; and
  • has published non-Mod Service Bulletin NMSB73-F408. That bulletin recommended the on-wing torque inspection of the turbine overspeed servo valve bolts in all installed engines or engines in overhaul shops where the life of the FMU is greater than 5,000 hours.
Download Final Report
[Download  PDF: 220KB]
General details
Date: 18 September 2006   Investigation status: Completed  
Time: 0422 UTC    
Location   (show map): 74 kms WNW Brisbane Airport    
State: Queensland   Occurrence type: Engine failure or malfunction  
Release date: 02 October 2007   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer The Boeing Company  
Aircraft model 777  
Aircraft registration 9M-MRM  
Serial number 29066  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Brisbane, Qld  
Departure time 0417  
Destination Kuala Lumpur, Malaysia  
Crew details
Role Class of licence Hours on type Hours total
Pilot-in-Command ATPL N/A N/A
Last update 18 April 2018